4...Nc6 with the Kan's ...a6 and ...Qc7: a flexible Sicilian where Black's pieces stay compact and the queen on c7 eyes e5 and h2. This is a advanced opening course for Black (ECO B47), written for players rated around 1700. Each move is explained and then drilled on a board; it is free.
Key ideas of Sicilian Taimanov & Kan
...e6 and ...Nc6 keep the d5 square covered and the dark-squared bishop free.
...a6 stops Nb5 and prepares ...b5; ...Qc7 controls e5 and c-file (the Kan set-up).
Against long castling, ...Bb4 and ...b5 bring quick counterplay.
If White exchanges on c6, ...bxc6 and ...d5 give Black a strong centre.
The line trainer
The line trainer for Sicilian Taimanov & Kan has 49 lines that grow out of 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6, learned a few new ones a day with spaced-repetition review.
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